Numerical Analysis of Flow Behavior in a Rectangular Channel with Submerged Weirs

Herrera-Granados, Oscar

doi:10.3390/w13101396

Cited by 4 publications

(2 citation statements)

References 23 publications

(27 reference statements)

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“…Turbulence flow behavior through a rectangular confluence channel was also investigated by Herrera-Granados (2021) [28] and laboratory records were compared with the simulation results of LES and RANS models. The model output was in good agreement with time-averaged factors but was not sufficient for the proper estimation of the turbulence quantities.…”

Section: Schindfessel Et Al (2017)mentioning

confidence: 99%

Numerical Simulation of Confluence Flow in a Degraded Bed

Behzad,

Mohammadian,

Rennie

et al. 2023

Water

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The fluid dynamics of channel confluences are highly complex due to flow separation and secondary currents. Although numerous studies in the past few decades have focused on the numerical simulation of confluence flow, deformed beds were rarely used. This study attempts to address this issue through numerical simulation of the flow behavior in an open-channel confluence flume with an equilibrium degraded bed in OpenFOAM (version 6.0) to compare the results with a flatbed. In the present study, different turbulence models, including Reynolds-Averaged Navier–Stokes (RANS), large-eddy simulation (LES), and detached eddy simulation (DES) models were performed using rigid-lid and volume-of-fluid (VoF) methods. The accuracy of the models was statistically analyzed by comparing them with observation data. The results demonstrated that the LES model had the best performance, with a minimum average normalized root-mean-square error (NRMSE) of 3% under the VoF assumption. The investigation also further illuminated the intricate interplay of vortical structures within the confluence zone. Notably, the number and behavior of vortices were found to be influenced by channel geometry and size, as well as interactions between separated shear layers. Circulation within the separation zone near the inner bank differed in rotation between the degraded and flatbed cases.

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Section: Schindfessel Et Al (2017)mentioning

confidence: 99%

Numerical Simulation of Confluence Flow in a Degraded Bed

Behzad,

Mohammadian,

Rennie

et al. 2023

Water

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show abstract

“…The results showed that the output of the models are in good agreement with time-average factors, but is not sufficient for the proper estimation of the turbulence quantities. [29] LES was discussed in [33] where an open-channel confluence flow was studied using LES to utilize a frictionless rigid-lid to treat the free-surface. Rigid lid approach in the simulation of an asymmetric confluence was used to analyze the limitation of the free-surface treatment.…”

Section: Tang Et Al (2018)mentioning

confidence: 99%

Numerical Simulation of Confluence Flow in a Degraded Bed Under Different Turbulence Models with a Comparison of Rigid Lid and Volume of Fluid

Behzad

Mohammadian

Rennie

et al. 2022

Preprint

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The fluid dynamics of open channel confluences are highly complex due to the flow separation, mixing and secondary currents. Although numerous studies in the past few decades have focused on the numerical simulation of confluence flow, deformed beds were rarely used. This study attempts to address this issue through numerical simulation of the flow behavior in an open channel confluence flume with an equilibrium degraded bed in OpenFOAM. In the present study, six turbulence models, including Reynolds-Averaged Navier-Stokes (RANS) (standard k–ε, realizable k–ε, k–ω SST, V2-f), large-eddy simulation (LES) and detached eddy simulation (DES) models were performed using rigid lid and volume of fluid (VoF) methods. The accuracy of the models was statistically analyzed by comparing with the observation data, and their performance was prioritized accordingly. The results of this study demonstrated that the LES model had the best performance, with a minimum average normalized mean square error (NRMSE) of 9% under the VoF assumption and 27% under the rigid lid method.

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Theoretical background and application of numerical modeling to surface water resources

Herrera-Granados

2022

Water Resource Modeling and Computational Technologies

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Numerical Analysis of Flow Behavior in a Rectangular Channel with Submerged Weirs

Cited by 4 publications

References 23 publications

Numerical Simulation of Confluence Flow in a Degraded Bed

Numerical Simulation of Confluence Flow in a Degraded Bed

Numerical Simulation of Confluence Flow in a Degraded Bed Under Different Turbulence Models with a Comparison of Rigid Lid and Volume of Fluid

Theoretical background and application of numerical modeling to surface water resources

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